Adiabatic Humidification Process

In this process, air enters a duct (which is assumed to be perfectly insulated in order to satisfy the condition for an adiabatic process) at dry-bulb temperature T1 and moisture content g1 and leaves the duct at dry-bulb temperature T2 and moisture content g2. The latent heat gained by the air is equal to the sensible heat loss by the air. i.e.

here hfg is the latent heat of water. If the water tank is infinitely long, the air at the outlet will be 100% saturated. The temperature at this condition is known as adiabatic saturation temperature. Related topics:
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